SQLAlchemy ORM – Updating Objects In this chapter, we will see how to modify or update the table with desired values. To modify data of a certain attribute of any object, we have to assign new value to it and commit the changes to make the change persistent. Let us fetch an object from the […]
Category Archives: sqlalchemy
Using UPDATE Expression The update() method on target table object constructs equivalent UPDATE SQL expression. table.update().where(conditions).values(SET expressions) The values() method on the resultant update object is used to specify the SET conditions of the UPDATE. If left as None, the SET conditions are determined from those parameters passed to the statement during the execution and/or […]
Using DELETE Expression In the previous chapter, we have understood what an Update expression does. The next expression that we are going to learn is Delete. The delete operation can be achieved by running delete() method on target table object as given in the following statement − stmt = students.delete() In case of students table, […]